When the PC is powered up, the CPU resets itself, clears out any left-over data, and looks to an address in memory
called F000 ...that is where the ROM BIOS chip is located. The ROM BIOS chip is what makes your PC IBMcompatible.
When the CPU finds the ROM BIOS chip, it invokes the first program found in memory, which is POST:
the Power-On Self Test. This self-test ensures that all of your components are operating properly BEFORE you begin
working with the computer.



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